/Engine/Source/Runtime/Engine/Classes/GameFramework/Actor.h
Returns a list of all actors spawned by our Child Actor Components, including children of children. This does not return the contents of the Children array
void GetAllChildActors ( [TArray](API\Runtime\Core\Containers\TArray)< [AActor](API\Runtime\Engine\GameFramework\AActor) * > & ChildActors, bool bIncludeDescendants ) const